Hi,

I just got a new pair of ATH-M30 for $40 on Amazon. They sound great!

For an extra $10, I could have got the ATH-M40FS.

Amazon accepts exchange but I want to make sure it's all worth it.

I will use them mostly for tracking and monitoring. According to reviews on Amazon, the M40FS are not comfortable to wear for several hours at a time.

Any opinion?

Thanks